1 files changed, 111 insertions, 0 deletions
diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c
new file mode 100644
index 000000000000..c3ba6a94da0c
--- /dev/null
+++ b/arch/arm/mm/copypage-feroceon.c
@@ -0,0 +1,111 @@
+/*
+ *  linux/arch/arm/mm/copypage-feroceon.S
+ *
+ *  Copyright (C) 2008 Marvell Semiconductors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This handles copy_user_highpage and clear_user_page on Feroceon
+ * more optimally than the generic implementations.
+ */
+#include <linux/init.h>
+#include <linux/highmem.h>
+static void __attribute__((naked))
+feroceon_copy_user_page(void *kto, const void *kfrom)
+{
+        asm("\
+        stmfd   sp!, {r4-r9, lr}                \n\
+        mov     ip, %0                          \n\
+1:      mov     lr, r1                          \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        pld     [lr, #32]                       \n\
+        pld     [lr, #64]                       \n\
+        pld     [lr, #96]                       \n\
+        pld     [lr, #128]                      \n\
+        pld     [lr, #160]                      \n\
+        pld     [lr, #192]                      \n\
+        pld     [lr, #224]                      \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        ldmia   r1!, {r2 - r9}                  \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        stmia   r0, {r2 - r9}                   \n\
+        subs    ip, ip, #(32 * 8)               \n\
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     r0, r0, #32                     \n\
+        bne     1b                              \n\
+        mcr     p15, 0, ip, c7, c10, 4          @ drain WB\n\
+        ldmfd   sp!, {r4-r9, pc}"
+        :
+        : "I" (PAGE_SIZE));
+}
+void feroceon_copy_user_highpage(struct page *to, struct page *from,
+        unsigned long vaddr)
+{
+        void *kto, *kfrom;
+        kto = kmap_atomic(to, KM_USER0);
+        kfrom = kmap_atomic(from, KM_USER1);
+        feroceon_copy_user_page(kto, kfrom);
+        kunmap_atomic(kfrom, KM_USER1);
+        kunmap_atomic(kto, KM_USER0);
+}
+void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+        void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+        asm volatile ("\
+        mov     r1, %2                          \n\
+        mov     r2, #0                          \n\
+        mov     r3, #0                          \n\
+        mov     r4, #0                          \n\
+        mov     r5, #0                          \n\
+        mov     r6, #0                          \n\
+        mov     r7, #0                          \n\
+        mov     ip, #0                          \n\
+        mov     lr, #0                          \n\
+1:      stmia   %0, {r2-r7, ip, lr}             \n\
+        subs    r1, r1, #1                      \n\
+        mcr     p15, 0, %0, c7, c14, 1          @ clean and invalidate D line\n\
+        add     %0, %0, #32                     \n\
+        bne     1b                              \n\
+        mcr     p15, 0, r1, c7, c10, 4          @ drain WB"
+        : "=r" (ptr)
+        : "0" (kaddr), "I" (PAGE_SIZE / 32)
+        : "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr");
+        kunmap_atomic(kaddr, KM_USER0);
+}
+struct cpu_user_fns feroceon_user_fns __initdata = {
+        .cpu_clear_user_highpage = feroceon_clear_user_highpage,
+        .cpu_copy_user_highpage = feroceon_copy_user_highpage,
+};

diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c new file mode 100644 index 000000000000..c3ba6a94da0c --- /dev/null +++ b/arch/arm/mm/copypage-feroceon.c
@@ -0,0 +1,111 @@
	1	/*
	2	* linux/arch/arm/mm/copypage-feroceon.S
	3	*
	4	* Copyright (C) 2008 Marvell Semiconductors
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* This handles copy_user_highpage and clear_user_page on Feroceon
	11	* more optimally than the generic implementations.
	12	*/
	13	#include <linux/init.h>
	14	#include <linux/highmem.h>
	15
	16	static void __attribute__((naked))
	17	feroceon_copy_user_page(void kto, const void kfrom)
	18	{
	19	asm("\
	20	stmfd sp!, {r4-r9, lr} \n\
	21	mov ip, %0 \n\
	22	1: mov lr, r1 \n\
	23	ldmia r1!, {r2 - r9} \n\
	24	pld [lr, #32] \n\
	25	pld [lr, #64] \n\
	26	pld [lr, #96] \n\
	27	pld [lr, #128] \n\
	28	pld [lr, #160] \n\
	29	pld [lr, #192] \n\
	30	pld [lr, #224] \n\
	31	stmia r0, {r2 - r9} \n\
	32	ldmia r1!, {r2 - r9} \n\
	33	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	34	add r0, r0, #32 \n\
	35	stmia r0, {r2 - r9} \n\
	36	ldmia r1!, {r2 - r9} \n\
	37	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	38	add r0, r0, #32 \n\
	39	stmia r0, {r2 - r9} \n\
	40	ldmia r1!, {r2 - r9} \n\
	41	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	42	add r0, r0, #32 \n\
	43	stmia r0, {r2 - r9} \n\
	44	ldmia r1!, {r2 - r9} \n\
	45	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	46	add r0, r0, #32 \n\
	47	stmia r0, {r2 - r9} \n\
	48	ldmia r1!, {r2 - r9} \n\
	49	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	50	add r0, r0, #32 \n\
	51	stmia r0, {r2 - r9} \n\
	52	ldmia r1!, {r2 - r9} \n\
	53	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	54	add r0, r0, #32 \n\
	55	stmia r0, {r2 - r9} \n\
	56	ldmia r1!, {r2 - r9} \n\
	57	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	58	add r0, r0, #32 \n\
	59	stmia r0, {r2 - r9} \n\
	60	subs ip, ip, #(32 * 8) \n\
	61	mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
	62	add r0, r0, #32 \n\
	63	bne 1b \n\
	64	mcr p15, 0, ip, c7, c10, 4 @ drain WB\n\
	65	ldmfd sp!, {r4-r9, pc}"
	66	:
	67	: "I" (PAGE_SIZE));
	68	}
	69
	70	void feroceon_copy_user_highpage(struct page to, struct page from,
	71	unsigned long vaddr)
	72	{
	73	void kto, kfrom;
	74
	75	kto = kmap_atomic(to, KM_USER0);
	76	kfrom = kmap_atomic(from, KM_USER1);
	77	feroceon_copy_user_page(kto, kfrom);
	78	kunmap_atomic(kfrom, KM_USER1);
	79	kunmap_atomic(kto, KM_USER0);
	80	}
	81
	82	void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr)
	83	{
	84	void ptr, kaddr = kmap_atomic(page, KM_USER0);
	85	asm volatile ("\
	86	mov r1, %2 \n\
	87	mov r2, #0 \n\
	88	mov r3, #0 \n\
	89	mov r4, #0 \n\
	90	mov r5, #0 \n\
	91	mov r6, #0 \n\
	92	mov r7, #0 \n\
	93	mov ip, #0 \n\
	94	mov lr, #0 \n\
	95	1: stmia %0, {r2-r7, ip, lr} \n\
	96	subs r1, r1, #1 \n\
	97	mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
	98	add %0, %0, #32 \n\
	99	bne 1b \n\
	100	mcr p15, 0, r1, c7, c10, 4 @ drain WB"
	101	: "=r" (ptr)
	102	: "0" (kaddr), "I" (PAGE_SIZE / 32)
	103	: "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr");
	104	kunmap_atomic(kaddr, KM_USER0);
	105	}
	106
	107	struct cpu_user_fns feroceon_user_fns __initdata = {
	108	.cpu_clear_user_highpage = feroceon_clear_user_highpage,
	109	.cpu_copy_user_highpage = feroceon_copy_user_highpage,
	110	};
	111